print("Ввести пос-ть")
s = input()
s1 = ""
for char in s:
    if char == "(":
        s1 += char
    if char == ")":
        if(len(s1) > 0):
            if s1[len(s1) - 1] == "(":
                s1 = s1[: -1]
    if char == "[":
        s1 += char
    if char == "]":
        if(len(s1) > 0):
            if s1[len(s1) - 1] == "[":
                s1 = s1[: -1]
    if char == "{":
        s1 += char
    if char == "}":
        if(len(s1) > 0):
            if s1[len(s1) - 1] == "{":
                s1 = s1[: -1]
    if char == "<":
        s1 += char
    if char == ">":
        if(len(s1) > 0):
            if s1[len(s1) - 1] == "<":
                s1 = s1[: -1]
if len(s1) == 0:
    print("Верная")
else:
    print("Неверная")

